Power Tool

a technology of power tools and tools, applied in the field of power tools, can solve the problems of transmission vibrations dominating the vibrations, and achieve the effect of reducing the vibrations occurring in operation and preventing lateral deviation of the tool members

Active Publication Date: 2010-06-17
ANDREAS STIHL AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]Advantageously, the linkage rod at the second pivot joint is guided in a direction parallel to the movement direction of the second tool member, in particular along an extension of the longitudinal center axis of the second tool member. Because the first pivot joint and the second pivot joint are guided in the same plane, which advantageously also contains the axis of rotation of the drive disk, and because the two connecting rods at any point in time are arranged parallel to one another, the forces of second order that are generated in operation in the transmission cancel one another completely. The linkage rod produces additional excitation forces of the first order. Advantageously, on the first tool member an additional mass is arranged that compensates the mass forces that are caused by the linkage rod at least partially and in part...

Problems solved by technology

In particular, at higher engine speeds the transmission v...

Method used

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Embodiment Construction

[0022]The embodiment of the power tool illustrated in FIG. 1 is a hand-held hedge trimmer 1. The power tool can also be, for example, a harvesting machine or another type of cutting device. For example, the power tool can be a combine harvester or a saw with oppositely driven cutting blades. The power tool can also be a special type of harvester such an olive shaker / harvester or the like. The hedge trimmer 1 has a housing 2 in which a drive motor, not shown in FIG. 1, is arranged. The drive motor is embodied as an internal combustion engine and is to be started by means of a starter handle 9 projecting from the housing 2. The housing 2 is supported by means of vibration damping elements on a grip frame 3. The grip frame 3 has a front handle 4 embodied as a bow-shaped handle as well as a rear handle 5. On the rear handle 5 a throttle lever 6 and a throttle lock 7 are pivotably supported. The rear handle 5 is supported so as to swivel about an axis of rotation 8 on the frame 3 so that...

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PUM

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Abstract

A power tool has a drive motor and first and second tool members driven reciprocatingly by the drive motor in opposite directions, respectively. The first tool member is driven by a first connecting rod and the first connecting rod is connected to the first tool member by a first pivot joint arranged on the first connecting rod. The second tool member is driven by a second connecting rod and the second connecting rod is connected to the second tool member by a second pivot joint arranged on the second connecting rod. The first pivot joint is arranged on an end of the first connecting rod which end is facing the tool members. The second pivot joint is arranged on an end of the second connecting rod which end is facing away from the tool members.

Description

BACKGROUND OF THE INVENTION[0001]The invention relates to a power tool, in particular a hand-held power tool such as a hedge trimmer or the like, comprising at least two tool members that are driven in a reciprocating fashion by a drive motor in opposite directions, respectively. Each tool member is driven by a connecting rod that is connected to the correlated tool member by means of a pivot joint arranged on the connecting rod. The pivot joint is arranged on the first connecting rod on the end of the first connecting rod that is facing the tool members.[0002]U.S. Pat. No. 5,771,583 discloses a power tool with a hedge trimmer attachment that has two oppositely driven shearing blades. The shearing blades are connected by connecting rods to an eccentric member. Both connecting rods extend in the direction toward the shearing blade supports, i.e., in the same direction.[0003]In power tools, in particular hand-held power tools, such as hedge trimmers or the like, the vibrations that oc...

Claims

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Application Information

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IPC IPC(8): A01G3/053
CPCA01G3/053
Inventor GEROMILLER, LUDWIG
Owner ANDREAS STIHL AG & CO KG
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